Important LINQ Changes in .NET 3.5 SP1

One of the interesting changes is in the Cast<T> operator and its behavior is better described in this post by Ed Maurer. I think that the side effects of this change should be limited, because the use of explicit type for the range variable in a query expression (i.e. from int n in numbers select… instead of from n in numbers select…) is not very common. In fact, I don’t remember examples of its usage in our Programming LINQ book. Take care of this change if you used (or will use) this syntax.

This article describes how DAX automatically converts data types in arithmetic operations. These small details can cause and explain differences in results when using the same operations in other languages. Read more

This article describes how to use the detail rows expression of a measure to obtain the equivalent of creating table functions in DAX. This allows the reusing of a table expression in multiple CALCULATE filters. Read more